Metro Posted June 28, 2006 Share Posted June 28, 2006 I'm not really sure if this is a megasquirt problem (as in my wiring) or a bad tach. I have a 76 280z with the stock tach and ever since I've installed megasquirt the tach is goes crazy over 3,000 rpms. Sounds a lot like this, but the car runs great and MS records the correct RPM. I have a wire connected to the negative side of the coil through the resistor from the old L28et wiring and out into my tach. My ignition setup: MSnS-extra running on a v3 hardware 76 VR distributor GM 4pin HEI module triggered by LED17(or 14, I forget which is which). So is my tach fried, is it wired incorrectly, or do I not have a big enough resistor for the new setup? Quote Link to comment Share on other sites More sharing options...
olie05 Posted June 28, 2006 Share Posted June 28, 2006 I'd say check your grounds and all connections... (isn't that the source of all electrical problems anyways?) Quote Link to comment Share on other sites More sharing options...
Metro Posted June 29, 2006 Author Share Posted June 29, 2006 Well I'm leaning towards my tach being fried. I borrowed an autometer tach from my dad last night and it would read the signal just fine. Of course the autometer worked fine with and without the resistor, hmm. Quote Link to comment Share on other sites More sharing options...
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